Air Purge – When Do I Need One?

Air Purge Specifications

Process Near Infrared (NIR) analyzers benefit from an air purge in dusty environments.   The optical light tube is equipped with a 1/4″ brass Swagelock fitting for filtered or plant air.  Air flow is typically 3-5 psig to provide a laminar air flow that prevents dirt and dust from accumulating on the lens and reducing light energy return to the detector.  Higher air pressures create a turbulent flow that doesn’t protect the lens from dirt accumulation.  The picture below illustrates the difference that an air purge can make in a very dusty environment such as mines, concrete processing, or other environments where dust, or dirt is prevalent.

Please contact your Process Sensors representative at 508.473-9901 to discuss your application today.

Air Purge before and after

Benefit of Air Purge

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